Bioactivity of selected plant powders against Prostephanus truncatus (Coleoptera: Bostrichidae) in stored maize grains

https://doi.org/10.17221/56/2011-PPSCitation:Chebet F., Deng A.L., Ogendo J.O., Kamau A.W., Bett P.K. (2013): Bioactivity of selected plant powders against Prostephanus truncatus (Coleoptera: Bostrichidae) in stored maize grains. Plant Protect. Sci., 49: 34-43.
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Crude powders of Azadirachta indica, Lantana camara, and Tephrosia vogelii, each at six concentrations (0.0, 2.0, 4.0, 6.0, 8.0, and 10% w/w), and Actellic SuperTM 2% dust were evaluated for repellence anti-feeding and toxicity to adult Prostephanus truncatus. Treatments were laid out in a completely randomised design with four replicates. Results showed that powders were strongly repellent (PR values 73.0–90.0%) and caused 46.2–52.2 and 69.7–85.6% reductions in grain damage and F1 progeny, respectively. Results showed that powders were weakly toxic to P. truncatus causing 40% kill 21 days after treatment compared to 100% kill by Actellic SuperTM2% dust 5 DAT. The findings are discussed in the context of their relevance for integrated pest management options in smallholder agriculture.
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